Edgar Rice Burroughs 
Skeleton Men of Jupiter 

In The Skeleton Men of Jupiter, John Carter is abducted by the skeleton men (or Morgors) and is brought to the planet Jupiter. There he learns about their plans to invade Barsoom. The Skeleton Men got the idea of abducting John Carter from Multis Par, the prince of the kingdom of Zor. When John Carter refuses to cooperate, the skeleton men also abduct Dejah Thoris, but still Carter won’t comply and is sentenced to death by emperor Bandolian. Can he escape or is his doom sealed?